Android — How to position View off-screen?

Question

I\'m trying to animate a simple ImageView in my application and I want it to slide in from the bottom of the screen and come to a resting position where the top 50px of the

Answer 1

To position my view offscreen I used the following code:

View myView = /* view you want to position offscreen */
int amountOffscreen = (int)(myView.getWidth() * 0.8); /* or whatever */
boolean offscreen = /* true or false */


int xOffset = (offscreen) ? amountOffscreen : 0;
RelativeLayout.LayoutParams rlParams = 
    (RelativeLayout.LayoutParams)myView.getLayoutParams();
rlParams.setMargins(-1*xOffset, 0, xOffset, 0);
myView.setLayoutParams(rlParams);

This code will position myView offscreen by amountOffscreen, which in this case puts 80% of the view offscreen leaving only 20% onscreen.

Do not use the layout() method directly - Android will make subsequent calls to invalidate your view for random reasons and only layoutParams are persisted across invalidate calls. If you are curious, check out lines 904 to 912 of this file to see why you have to modify the layoutParams.